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Multi-time-scale input approaches for hourly-scale rainfall-runoff modeling based on recurrent neural networks
Date
2021-11-01
Author
Ishida, Kei
Kiyama, Masato
Ercan, Ali
Amagasaki, Motoki
Tu, Tongbi
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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This study proposes two effective approaches to reduce the required computational time of the training process for time-series modeling through a recurrent neural network (RNN) using multi-time-scale time-series data as input. One approach provides coarse and fine temporal resolutions of the input time-series data to RNN in parallel. The other concatenates the coarse and fine temporal resolutions of the input time-series data over time before considering them as the input to RNN. In both approaches, first, the finer temporal resolution data are utilized to learn the fine temporal scale behavior of the target data. Then, coarser temporal resolution data are expected to capture long-duration dependencies between the input and target variables. The proposed approaches were implemented for hourly rainfall-runoff modeling at a snow-dominated watershed by employing a long short-term memory network, which is a type of RNN. Subsequently, the daily and hourly meteorological data were utilized as the input, and hourly flow discharge was considered as the target data. The results confirm that both of the proposed approaches can reduce the required computational time for the training of RNN significantly. Lastly, one of the proposed approaches improves the estimation accuracy considerably in addition to computational efficiency.
Subject Keywords
deep learning
,
fine temporal resolution
,
long short-term memory network
,
rainfall-runoff modeling
,
time-series modeling
,
PREDICTION
,
QUANTIFICATION
URI
https://hdl.handle.net/11511/100983
Journal
JOURNAL OF HYDROINFORMATICS
DOI
https://doi.org/10.2166/hydro.2021.095
Collections
Department of Civil Engineering, Article
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BibTeX
K. Ishida, M. Kiyama, A. Ercan, M. Amagasaki, and T. Tu, “Multi-time-scale input approaches for hourly-scale rainfall-runoff modeling based on recurrent neural networks,”
JOURNAL OF HYDROINFORMATICS
, vol. 23, no. 6, pp. 1312–1324, 2021, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/100983.